3 Copyright Andrew Tridgell <tridge@samba.org> 2000
4 Copyright Tim Potter <tpot@samba.org> 2000
5 Copyright Andrew Bartlett <abartlet@samba.org> 2002
6 Copyright Guenther Deschner <gd@samba.org> 2005-2008
8 largely based on pam_userdb by Cristian Gafton <gafton@redhat.com> also
9 contains large slabs of code from pam_unix by Elliot Lee
10 <sopwith@redhat.com> (see copyright below for full details)
13 #include "pam_winbind.h"
15 enum pam_winbind_request_type
17 PAM_WINBIND_AUTHENTICATE,
19 PAM_WINBIND_ACCT_MGMT,
20 PAM_WINBIND_OPEN_SESSION,
21 PAM_WINBIND_CLOSE_SESSION,
22 PAM_WINBIND_CHAUTHTOK,
26 static int wbc_error_to_pam_error(wbcErr status)
31 case WBC_ERR_NOT_IMPLEMENTED:
32 return PAM_SERVICE_ERR;
33 case WBC_ERR_UNKNOWN_FAILURE:
35 case WBC_ERR_NO_MEMORY:
37 case WBC_ERR_INVALID_SID:
38 case WBC_ERR_INVALID_PARAM:
40 case WBC_ERR_WINBIND_NOT_AVAILABLE:
41 return PAM_AUTHINFO_UNAVAIL;
42 case WBC_ERR_DOMAIN_NOT_FOUND:
43 return PAM_AUTHINFO_UNAVAIL;
44 case WBC_ERR_INVALID_RESPONSE:
46 case WBC_ERR_NSS_ERROR:
47 return PAM_USER_UNKNOWN;
48 case WBC_ERR_AUTH_ERROR:
50 case WBC_ERR_UNKNOWN_USER:
51 return PAM_USER_UNKNOWN;
52 case WBC_ERR_UNKNOWN_GROUP:
53 return PAM_USER_UNKNOWN;
54 case WBC_ERR_PWD_CHANGE_FAILED:
62 static const char *_pam_error_code_str(int err)
68 return "PAM_OPEN_ERR";
70 return "PAM_SYMBOL_ERR";
72 return "PAM_SERVICE_ERR";
74 return "PAM_SYSTEM_ERR";
78 return "PAM_PERM_DENIED";
80 return "PAM_AUTH_ERR";
81 case PAM_CRED_INSUFFICIENT:
82 return "PAM_CRED_INSUFFICIENT";
83 case PAM_AUTHINFO_UNAVAIL:
84 return "PAM_AUTHINFO_UNAVAIL";
85 case PAM_USER_UNKNOWN:
86 return "PAM_USER_UNKNOWN";
88 return "PAM_MAXTRIES";
89 case PAM_NEW_AUTHTOK_REQD:
90 return "PAM_NEW_AUTHTOK_REQD";
91 case PAM_ACCT_EXPIRED:
92 return "PAM_ACCT_EXPIRED";
94 return "PAM_SESSION_ERR";
95 case PAM_CRED_UNAVAIL:
96 return "PAM_CRED_UNAVAIL";
97 case PAM_CRED_EXPIRED:
98 return "PAM_CRED_EXPIRED";
100 return "PAM_CRED_ERR";
101 case PAM_NO_MODULE_DATA:
102 return "PAM_NO_MODULE_DATA";
104 return "PAM_CONV_ERR";
105 case PAM_AUTHTOK_ERR:
106 return "PAM_AUTHTOK_ERR";
107 case PAM_AUTHTOK_RECOVER_ERR:
108 return "PAM_AUTHTOK_RECOVER_ERR";
109 case PAM_AUTHTOK_LOCK_BUSY:
110 return "PAM_AUTHTOK_LOCK_BUSY";
111 case PAM_AUTHTOK_DISABLE_AGING:
112 return "PAM_AUTHTOK_DISABLE_AGING";
114 return "PAM_TRY_AGAIN";
119 case PAM_AUTHTOK_EXPIRED:
120 return "PAM_AUTHTOK_EXPIRED";
121 #ifdef PAM_MODULE_UNKNOWN
122 case PAM_MODULE_UNKNOWN:
123 return "PAM_MODULE_UNKNOWN";
127 return "PAM_BAD_ITEM";
129 #ifdef PAM_CONV_AGAIN
131 return "PAM_CONV_AGAIN";
133 #ifdef PAM_INCOMPLETE
135 return "PAM_INCOMPLETE";
142 #define _PAM_LOG_FUNCTION_ENTER(function, ctx) \
144 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] ENTER: " \
145 function " (flags: 0x%04x)", ctx->pamh, ctx->flags); \
146 _pam_log_state(ctx); \
149 #define _PAM_LOG_FUNCTION_LEAVE(function, ctx, retval) \
151 _pam_log_debug(ctx, LOG_DEBUG, "[pamh: %p] LEAVE: " \
152 function " returning %d (%s)", ctx ? ctx->pamh : NULL, retval, \
153 _pam_error_code_str(retval)); \
154 _pam_log_state(ctx); \
159 #define MAX_PASSWD_TRIES 3
162 static char initialized = 0;
164 static inline void textdomain_init(void);
165 static inline void textdomain_init(void)
168 bindtextdomain(MODULE_NAME, LOCALEDIR);
176 /* some syslogging */
178 #ifdef HAVE_PAM_VSYSLOG
179 static void _pam_log_int(const pam_handle_t *pamh,
184 pam_vsyslog(pamh, err, format, args);
187 static void _pam_log_int(const pam_handle_t *pamh,
192 char *format2 = NULL;
195 pam_get_item(pamh, PAM_SERVICE, (const void **) &service);
197 format2 = (char *)malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
198 if (format2 == NULL) {
199 /* what else todo ? */
200 vsyslog(err, format, args);
204 sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
205 vsyslog(err, format2, args);
208 #endif /* HAVE_PAM_VSYSLOG */
210 static bool _pam_log_is_silent(int ctrl)
212 return on(ctrl, WINBIND_SILENT);
215 static void _pam_log(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
216 static void _pam_log(struct pwb_context *r, int err, const char *format, ...)
220 if (_pam_log_is_silent(r->ctrl)) {
224 va_start(args, format);
225 _pam_log_int(r->pamh, err, format, args);
228 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
229 static void __pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
233 if (_pam_log_is_silent(ctrl)) {
237 va_start(args, format);
238 _pam_log_int(pamh, err, format, args);
242 static bool _pam_log_is_debug_enabled(int ctrl)
248 if (_pam_log_is_silent(ctrl)) {
252 if (!(ctrl & WINBIND_DEBUG_ARG)) {
259 static bool _pam_log_is_debug_state_enabled(int ctrl)
261 if (!(ctrl & WINBIND_DEBUG_STATE)) {
265 return _pam_log_is_debug_enabled(ctrl);
268 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
269 static void _pam_log_debug(struct pwb_context *r, int err, const char *format, ...)
273 if (!r || !_pam_log_is_debug_enabled(r->ctrl)) {
277 va_start(args, format);
278 _pam_log_int(r->pamh, err, format, args);
281 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
282 static void __pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
286 if (!_pam_log_is_debug_enabled(ctrl)) {
290 va_start(args, format);
291 _pam_log_int(pamh, err, format, args);
295 static void _pam_log_state_datum(struct pwb_context *ctx,
300 const void *data = NULL;
301 if (item_type != 0) {
302 pam_get_item(ctx->pamh, item_type, &data);
304 pam_get_data(ctx->pamh, key, &data);
307 const char *type = (item_type != 0) ? "ITEM" : "DATA";
308 if (is_string != 0) {
309 _pam_log_debug(ctx, LOG_DEBUG,
310 "[pamh: %p] STATE: %s(%s) = \"%s\" (%p)",
311 ctx->pamh, type, key, (const char *)data,
314 _pam_log_debug(ctx, LOG_DEBUG,
315 "[pamh: %p] STATE: %s(%s) = %p",
316 ctx->pamh, type, key, data);
321 #define _PAM_LOG_STATE_DATA_POINTER(ctx, module_data_name) \
322 _pam_log_state_datum(ctx, 0, module_data_name, 0)
324 #define _PAM_LOG_STATE_DATA_STRING(ctx, module_data_name) \
325 _pam_log_state_datum(ctx, 0, module_data_name, 1)
327 #define _PAM_LOG_STATE_ITEM_POINTER(ctx, item_type) \
328 _pam_log_state_datum(ctx, item_type, #item_type, 0)
330 #define _PAM_LOG_STATE_ITEM_STRING(ctx, item_type) \
331 _pam_log_state_datum(ctx, item_type, #item_type, 1)
333 #ifdef DEBUG_PASSWORD
334 #define _LOG_PASSWORD_AS_STRING 1
336 #define _LOG_PASSWORD_AS_STRING 0
339 #define _PAM_LOG_STATE_ITEM_PASSWORD(ctx, item_type) \
340 _pam_log_state_datum(ctx, item_type, #item_type, \
341 _LOG_PASSWORD_AS_STRING)
343 * wrapper to preserve old behaviour of iniparser which ignored
344 * key values that had no value assigned like
346 * for a key like above newer iniparser will return a zero-length
347 * string, previously iniparser would return NULL
349 * JRA: For compatibility, tiniparser behaves like iniparser.
351 static const char *tiniparser_getstring_nonempty(struct tiniparser_dictionary *d,
355 const char *ret = tiniparser_getstring(d, key, def);
356 if (ret && strlen(ret) == 0) {
362 static void _pam_log_state(struct pwb_context *ctx)
364 if (!ctx || !_pam_log_is_debug_state_enabled(ctx->ctrl)) {
368 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_SERVICE);
369 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER);
370 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_TTY);
371 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RHOST);
372 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_RUSER);
373 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_OLDAUTHTOK);
374 _PAM_LOG_STATE_ITEM_PASSWORD(ctx, PAM_AUTHTOK);
375 _PAM_LOG_STATE_ITEM_STRING(ctx, PAM_USER_PROMPT);
376 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_CONV);
377 #ifdef PAM_FAIL_DELAY
378 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_FAIL_DELAY);
380 #ifdef PAM_REPOSITORY
381 _PAM_LOG_STATE_ITEM_POINTER(ctx, PAM_REPOSITORY);
384 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_HOMEDIR);
385 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSCRIPT);
386 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_LOGONSERVER);
387 _PAM_LOG_STATE_DATA_STRING(ctx, PAM_WINBIND_PROFILEPATH);
388 _PAM_LOG_STATE_DATA_STRING(ctx,
389 PAM_WINBIND_NEW_AUTHTOK_REQD);
390 /* Use atoi to get PAM result code */
391 _PAM_LOG_STATE_DATA_STRING(ctx,
392 PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
393 _PAM_LOG_STATE_DATA_POINTER(ctx, PAM_WINBIND_PWD_LAST_SET);
396 static int _pam_parse(const pam_handle_t *pamh,
400 enum pam_winbind_request_type type,
401 struct tiniparser_dictionary **result_d)
404 const char *config_file = NULL;
407 struct tiniparser_dictionary *d = NULL;
409 if (flags & PAM_SILENT) {
410 ctrl |= WINBIND_SILENT;
413 for (i=argc,v=argv; i-- > 0; ++v) {
414 if (!strncasecmp(*v, "config", strlen("config"))) {
415 ctrl |= WINBIND_CONFIG_FILE;
421 if (config_file == NULL) {
422 config_file = PAM_WINBIND_CONFIG_FILE;
425 d = tiniparser_load(config_file);
427 goto config_from_pam;
430 if (tiniparser_getboolean(d, "global:debug", false)) {
431 ctrl |= WINBIND_DEBUG_ARG;
434 if (tiniparser_getboolean(d, "global:debug_state", false)) {
435 ctrl |= WINBIND_DEBUG_STATE;
438 if (tiniparser_getboolean(d, "global:cached_login", false)) {
439 ctrl |= WINBIND_CACHED_LOGIN;
442 if (tiniparser_getboolean(d, "global:krb5_auth", false)) {
443 ctrl |= WINBIND_KRB5_AUTH;
446 if (tiniparser_getboolean(d, "global:silent", false)) {
447 ctrl |= WINBIND_SILENT;
450 if (tiniparser_getstring_nonempty(d, "global:krb5_ccache_type", NULL) != NULL) {
451 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
454 if ((tiniparser_getstring_nonempty(d, "global:require-membership-of", NULL)
456 (tiniparser_getstring_nonempty(d, "global:require_membership_of", NULL)
458 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
461 if (tiniparser_getboolean(d, "global:try_first_pass", false)) {
462 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
465 if (tiniparser_getint(d, "global:warn_pwd_expire", 0)) {
466 ctrl |= WINBIND_WARN_PWD_EXPIRE;
469 if (tiniparser_getboolean(d, "global:mkhomedir", false)) {
470 ctrl |= WINBIND_MKHOMEDIR;
474 /* step through arguments */
475 for (i=argc,v=argv; i-- > 0; ++v) {
477 /* generic options */
478 if (!strcmp(*v,"debug"))
479 ctrl |= WINBIND_DEBUG_ARG;
480 else if (!strcasecmp(*v, "debug_state"))
481 ctrl |= WINBIND_DEBUG_STATE;
482 else if (!strcasecmp(*v, "silent"))
483 ctrl |= WINBIND_SILENT;
484 else if (!strcasecmp(*v, "use_authtok"))
485 ctrl |= WINBIND_USE_AUTHTOK_ARG;
486 else if (!strcasecmp(*v, "use_first_pass"))
487 ctrl |= WINBIND_USE_FIRST_PASS_ARG;
488 else if (!strcasecmp(*v, "try_first_pass"))
489 ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
490 else if (!strcasecmp(*v, "unknown_ok"))
491 ctrl |= WINBIND_UNKNOWN_OK_ARG;
492 else if ((type == PAM_WINBIND_AUTHENTICATE
493 || type == PAM_WINBIND_SETCRED)
494 && !strncasecmp(*v, "require_membership_of",
495 strlen("require_membership_of")))
496 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
497 else if ((type == PAM_WINBIND_AUTHENTICATE
498 || type == PAM_WINBIND_SETCRED)
499 && !strncasecmp(*v, "require-membership-of",
500 strlen("require-membership-of")))
501 ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
502 else if (!strcasecmp(*v, "krb5_auth"))
503 ctrl |= WINBIND_KRB5_AUTH;
504 else if (!strncasecmp(*v, "krb5_ccache_type",
505 strlen("krb5_ccache_type")))
506 ctrl |= WINBIND_KRB5_CCACHE_TYPE;
507 else if (!strcasecmp(*v, "cached_login"))
508 ctrl |= WINBIND_CACHED_LOGIN;
509 else if (!strcasecmp(*v, "mkhomedir"))
510 ctrl |= WINBIND_MKHOMEDIR;
511 else if (!strncasecmp(*v, "warn_pwd_expire",
512 strlen("warn_pwd_expire")))
513 ctrl |= WINBIND_WARN_PWD_EXPIRE;
514 else if (type != PAM_WINBIND_CLEANUP) {
515 __pam_log(pamh, ctrl, LOG_ERR,
516 "pam_parse: unknown option: %s", *v);
526 tiniparser_freedict(d);
533 static int _pam_winbind_free_context(struct pwb_context *ctx)
540 tiniparser_freedict(ctx->dict);
546 static int _pam_winbind_init_context(pam_handle_t *pamh,
550 enum pam_winbind_request_type type,
551 struct pwb_context **ctx_p)
553 struct pwb_context *r = NULL;
559 r = talloc_zero(NULL, struct pwb_context);
564 talloc_set_destructor(r, _pam_winbind_free_context);
570 r->ctrl = _pam_parse(pamh, flags, argc, argv, type, &r->dict);
573 return PAM_SYSTEM_ERR;
581 static void _pam_winbind_cleanup_func(pam_handle_t *pamh,
585 int ctrl = _pam_parse(pamh, 0, 0, NULL, PAM_WINBIND_CLEANUP, NULL);
586 if (_pam_log_is_debug_state_enabled(ctrl)) {
587 __pam_log_debug(pamh, ctrl, LOG_DEBUG,
588 "[pamh: %p] CLEAN: cleaning up PAM data %p "
589 "(error_status = %d)", pamh, data,
596 static const struct ntstatus_errors {
597 const char *ntstatus_string;
598 const char *error_string;
599 } ntstatus_errors[] = {
602 {"NT_STATUS_BACKUP_CONTROLLER",
603 N_("No primary Domain Controler available")},
604 {"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
605 N_("No domain controllers found")},
606 {"NT_STATUS_NO_LOGON_SERVERS",
607 N_("No logon servers")},
608 {"NT_STATUS_PWD_TOO_SHORT",
609 N_("Password too short")},
610 {"NT_STATUS_PWD_TOO_RECENT",
611 N_("The password of this user is too recent to change")},
612 {"NT_STATUS_PWD_HISTORY_CONFLICT",
613 N_("Password is already in password history")},
614 {"NT_STATUS_PASSWORD_EXPIRED",
615 N_("Your password has expired")},
616 {"NT_STATUS_PASSWORD_MUST_CHANGE",
617 N_("You need to change your password now")},
618 {"NT_STATUS_INVALID_WORKSTATION",
619 N_("You are not allowed to logon from this workstation")},
620 {"NT_STATUS_INVALID_LOGON_HOURS",
621 N_("You are not allowed to logon at this time")},
622 {"NT_STATUS_ACCOUNT_EXPIRED",
623 N_("Your account has expired. "
624 "Please contact your System administrator")}, /* SCNR */
625 {"NT_STATUS_ACCOUNT_DISABLED",
626 N_("Your account is disabled. "
627 "Please contact your System administrator")}, /* SCNR */
628 {"NT_STATUS_ACCOUNT_LOCKED_OUT",
629 N_("Your account has been locked. "
630 "Please contact your System administrator")}, /* SCNR */
631 {"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
632 N_("Invalid Trust Account")},
633 {"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
634 N_("Invalid Trust Account")},
635 {"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
636 N_("Invalid Trust Account")},
637 {"NT_STATUS_ACCESS_DENIED",
638 N_("Access is denied")},
642 static const char *_get_ntstatus_error_string(const char *nt_status_string)
645 for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
646 if (!strcasecmp(ntstatus_errors[i].ntstatus_string,
648 return _(ntstatus_errors[i].error_string);
654 /* --- authentication management functions --- */
656 /* Attempt a conversation */
658 static int converse(const pam_handle_t *pamh,
660 struct pam_message **message,
661 struct pam_response **response)
664 struct pam_conv *conv;
666 retval = pam_get_item(pamh, PAM_CONV, (const void **) &conv);
667 if (retval == PAM_SUCCESS) {
668 retval = conv->conv(nargs,
669 discard_const_p(const struct pam_message *, message),
670 response, conv->appdata_ptr);
673 return retval; /* propagate error status */
677 static int _make_remark(struct pwb_context *ctx,
681 int retval = PAM_SUCCESS;
683 struct pam_message *pmsg[1], msg[1];
684 struct pam_response *resp;
686 if (ctx->flags & WINBIND_SILENT) {
691 msg[0].msg = discard_const_p(char, text);
692 msg[0].msg_style = type;
695 retval = converse(ctx->pamh, 1, pmsg, &resp);
698 _pam_drop_reply(resp, 1);
703 static int _make_remark_v(struct pwb_context *ctx,
711 ret = vasprintf(&var, format, args);
713 _pam_log(ctx, LOG_ERR, "memory allocation failure");
717 ret = _make_remark(ctx, type, var);
722 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
723 static int _make_remark_format(struct pwb_context *ctx, int type, const char *format, ...)
728 va_start(args, format);
729 ret = _make_remark_v(ctx, type, format, args);
734 static int pam_winbind_request_log(struct pwb_context *ctx,
741 /* incorrect password */
742 _pam_log(ctx, LOG_WARNING, "user '%s' denied access "
743 "(incorrect password or invalid membership)", user);
745 case PAM_ACCT_EXPIRED:
746 /* account expired */
747 _pam_log(ctx, LOG_WARNING, "user '%s' account expired",
750 case PAM_AUTHTOK_EXPIRED:
751 /* password expired */
752 _pam_log(ctx, LOG_WARNING, "user '%s' password expired",
755 case PAM_NEW_AUTHTOK_REQD:
756 /* new password required */
757 _pam_log(ctx, LOG_WARNING, "user '%s' new password "
760 case PAM_USER_UNKNOWN:
761 /* the user does not exist */
762 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
764 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
769 /* Otherwise, the authentication looked good */
770 if (strcmp(fn, "wbcLogonUser") == 0) {
771 _pam_log(ctx, LOG_NOTICE,
772 "user '%s' granted access", user);
774 _pam_log(ctx, LOG_NOTICE,
775 "user '%s' OK", user);
779 /* we don't know anything about this return value */
780 _pam_log(ctx, LOG_ERR,
781 "internal module error (retval = %s(%d), user = '%s')",
782 _pam_error_code_str(retval), retval, user);
787 static int wbc_auth_error_to_pam_error(struct pwb_context *ctx,
788 struct wbcAuthErrorInfo *e,
790 const char *username,
793 int ret = PAM_AUTH_ERR;
795 if (WBC_ERROR_IS_OK(status)) {
796 _pam_log_debug(ctx, LOG_DEBUG, "request %s succeeded",
799 return pam_winbind_request_log(ctx, ret, username, fn);
803 if (e->pam_error != PAM_SUCCESS) {
804 _pam_log(ctx, LOG_ERR,
805 "request %s failed: %s, "
806 "PAM error: %s (%d), NTSTATUS: %s, "
807 "Error message was: %s",
809 wbcErrorString(status),
810 _pam_error_code_str(e->pam_error),
815 return pam_winbind_request_log(ctx, ret, username, fn);
818 _pam_log(ctx, LOG_ERR, "request %s failed, but PAM error 0!", fn);
820 ret = PAM_SERVICE_ERR;
821 return pam_winbind_request_log(ctx, ret, username, fn);
824 ret = wbc_error_to_pam_error(status);
825 return pam_winbind_request_log(ctx, ret, username, fn);
828 #if defined(HAVE_PAM_RADIO_TYPE)
829 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
831 struct pam_message msg, *pmsg;
832 struct pam_response *resp = NULL;
836 msg.msg_style = PAM_RADIO_TYPE;
837 msg.msg = _("Do you want to change your password now?");
838 ret = converse(ctx->pamh, 1, &pmsg, &resp);
840 if (ret == PAM_SUCCESS) {
841 _pam_log(ctx, LOG_CRIT, "pam_winbind: system error!\n");
845 if (ret != PAM_SUCCESS) {
848 _pam_log(ctx, LOG_CRIT, "Received [%s] reply from application.\n", resp->resp);
850 if ((resp->resp != NULL) && (strcasecmp(resp->resp, "yes") == 0)) {
854 _pam_drop_reply(resp, 1);
858 static bool _pam_winbind_change_pwd(struct pwb_context *ctx)
865 * send a password expiry message if required
867 * @param ctx PAM winbind context.
868 * @param next_change expected (calculated) next expiry date.
869 * @param already_expired pointer to a boolean to indicate if the password is
872 * @return boolean Returns true if message has been sent, false if not.
875 static bool _pam_send_password_expiry_message(struct pwb_context *ctx,
879 bool *already_expired,
883 struct tm tm_now, tm_next_change;
887 if (already_expired) {
888 *already_expired = false;
895 if (next_change <= now) {
896 PAM_WB_REMARK_DIRECT(ctx, "NT_STATUS_PASSWORD_EXPIRED");
897 if (already_expired) {
898 *already_expired = true;
903 if ((next_change < 0) ||
904 (next_change > now + warn_pwd_expire * SECONDS_PER_DAY)) {
908 if ((localtime_r(&now, &tm_now) == NULL) ||
909 (localtime_r(&next_change, &tm_next_change) == NULL)) {
913 days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) -
914 (tm_now.tm_yday+tm_now.tm_year*365);
917 ret = _make_remark(ctx, PAM_TEXT_INFO,
918 _("Your password expires today.\n"));
921 * If change_pwd and already_expired is null.
922 * We are just sending a notification message.
923 * We don't expect any response in this case.
926 if (!change_pwd && !already_expired) {
931 * successfully sent the warning message.
932 * Give the user a chance to change pwd.
934 if (ret == PAM_SUCCESS) {
936 retval = _pam_winbind_change_pwd(ctx);
945 if (days > 0 && days < warn_pwd_expire) {
947 ret = _make_remark_format(ctx, PAM_TEXT_INFO,
948 _("Your password will expire in %d %s.\n"),
949 days, (days > 1) ? _("days"):_("day"));
951 * If change_pwd and already_expired is null.
952 * We are just sending a notification message.
953 * We don't expect any response in this case.
956 if (!change_pwd && !already_expired) {
961 * successfully sent the warning message.
962 * Give the user a chance to change pwd.
964 if (ret == PAM_SUCCESS) {
966 retval = _pam_winbind_change_pwd(ctx);
979 * Send a warning if the password expires in the near future
981 * @param ctx PAM winbind context.
982 * @param response The full authentication response structure.
983 * @param already_expired boolean, is the pwd already expired?
988 static void _pam_warn_password_expiry(struct pwb_context *ctx,
989 const struct wbcAuthUserInfo *info,
990 const struct wbcUserPasswordPolicyInfo *policy,
992 bool *already_expired,
995 time_t now = time(NULL);
996 time_t next_change = 0;
998 if (!info || !policy) {
1002 if (already_expired) {
1003 *already_expired = false;
1007 *change_pwd = false;
1010 /* accounts with WBC_ACB_PWNOEXP set never receive a warning */
1011 if (info->acct_flags & WBC_ACB_PWNOEXP) {
1015 /* no point in sending a warning if this is a grace logon */
1016 if (PAM_WB_GRACE_LOGON(info->user_flags)) {
1020 /* check if the info3 must change timestamp has been set */
1021 next_change = info->pass_must_change_time;
1023 if (_pam_send_password_expiry_message(ctx, next_change, now,
1030 /* now check for the global password policy */
1031 /* good catch from Ralf Haferkamp: an expiry of "never" is translated
1033 if ((policy->expire == (int64_t)-1) ||
1034 (policy->expire == 0)) {
1038 next_change = info->pass_last_set_time + policy->expire;
1040 if (_pam_send_password_expiry_message(ctx, next_change, now,
1047 /* no warning sent */
1050 #define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
1053 * Append a string, making sure not to overflow and to always return a
1054 * NULL-terminated string.
1056 * @param dest Destination string buffer (must already be NULL-terminated).
1057 * @param src Source string buffer.
1058 * @param dest_buffer_size Size of dest buffer in bytes.
1060 * @return false if dest buffer is not big enough (no bytes copied), true on
1064 static bool safe_append_string(char *dest,
1066 int dest_buffer_size)
1069 len = strlcat(dest, src, dest_buffer_size);
1070 return (len < dest_buffer_size);
1074 * Convert a names into a SID string, appending it to a buffer.
1076 * @param ctx PAM winbind context.
1077 * @param user User in PAM request.
1078 * @param name Name to convert.
1079 * @param sid_list_buffer Where to append the string sid.
1080 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1082 * @return false on failure, true on success.
1084 static bool winbind_name_to_sid_string(struct pwb_context *ctx,
1087 char *sid_list_buffer,
1088 int sid_list_buffer_size)
1090 char sid_string[WBC_SID_STRING_BUFLEN];
1093 if (IS_SID_STRING(name)) {
1094 strlcpy(sid_string, name, sizeof(sid_string));
1097 struct wbcDomainSid sid;
1098 enum wbcSidType type;
1100 _pam_log_debug(ctx, LOG_DEBUG,
1101 "no sid given, looking up: %s\n", name);
1103 wbc_status = wbcLookupName("", name, &sid, &type);
1104 if (!WBC_ERROR_IS_OK(wbc_status)) {
1105 _pam_log(ctx, LOG_INFO,
1106 "could not lookup name: %s\n", name);
1110 wbcSidToStringBuf(&sid, sid_string, sizeof(sid_string));
1113 if (!safe_append_string(sid_list_buffer, sid_string,
1114 sid_list_buffer_size)) {
1121 * Convert a list of names into a list of sids.
1123 * @param ctx PAM winbind context.
1124 * @param user User in PAM request.
1125 * @param name_list List of names or string sids, separated by commas.
1126 * @param sid_list_buffer Where to put the list of string sids.
1127 * @param sid_list_buffer Size of sid_list_buffer (in bytes).
1129 * @return false on failure, true on success.
1131 static bool winbind_name_list_to_sid_string_list(struct pwb_context *ctx,
1133 const char *name_list,
1134 char *sid_list_buffer,
1135 int sid_list_buffer_size)
1137 bool result = false;
1138 char *current_name = NULL;
1139 const char *search_location;
1143 if (sid_list_buffer_size > 0) {
1144 sid_list_buffer[0] = 0;
1147 search_location = name_list;
1148 while ((comma = strchr(search_location, ',')) != NULL) {
1149 current_name = strndup(search_location,
1150 comma - search_location);
1151 if (NULL == current_name) {
1155 if (!winbind_name_to_sid_string(ctx, user,
1158 sid_list_buffer_size)) {
1160 * If one group name failed, we must not fail
1161 * the authentication totally, continue with
1162 * the following group names. If user belongs to
1163 * one of the valid groups, we must allow it
1167 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1168 "check if group %s is valid group.", current_name,
1170 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1171 "to sid, please contact your administrator to see "
1172 "if group %s is valid."), current_name, current_name);
1173 SAFE_FREE(current_name);
1174 search_location = comma + 1;
1178 SAFE_FREE(current_name);
1180 if (!safe_append_string(sid_list_buffer, ",",
1181 sid_list_buffer_size)) {
1185 search_location = comma + 1;
1188 if (!winbind_name_to_sid_string(ctx, user, search_location,
1190 sid_list_buffer_size)) {
1191 _pam_log(ctx, LOG_INFO, "cannot convert group %s to sid, "
1192 "check if group %s is valid group.", search_location,
1194 _make_remark_format(ctx, PAM_TEXT_INFO, _("Cannot convert group %s "
1195 "to sid, please contact your administrator to see "
1196 "if group %s is valid."), search_location, search_location);
1198 /* If no valid groups were converted we should fail outright */
1199 if (name_list != NULL && strlen(sid_list_buffer) == 0) {
1204 * The lookup of the last name failed..
1205 * It results in require_member_of_sid ends with ','
1206 * It is malformated parameter here, overwrite the last ','.
1208 len = strlen(sid_list_buffer);
1209 if ((len != 0) && (sid_list_buffer[len - 1] == ',')) {
1210 sid_list_buffer[len - 1] = '\0';
1217 SAFE_FREE(current_name);
1222 * put krb5ccname variable into environment
1224 * @param ctx PAM winbind context.
1225 * @param krb5ccname env variable retrieved from winbindd.
1230 static void _pam_setup_krb5_env(struct pwb_context *ctx,
1231 struct wbcLogonUserInfo *info)
1236 const char *krb5ccname = NULL;
1238 if (off(ctx->ctrl, WINBIND_KRB5_AUTH)) {
1246 for (i=0; i < info->num_blobs; i++) {
1247 if (strcasecmp(info->blobs[i].name, "krb5ccname") == 0) {
1248 krb5ccname = (const char *)info->blobs[i].blob.data;
1253 if (!krb5ccname || (strlen(krb5ccname) == 0)) {
1257 _pam_log_debug(ctx, LOG_DEBUG,
1258 "request returned KRB5CCNAME: %s", krb5ccname);
1260 if (asprintf(&var, "KRB5CCNAME=%s", krb5ccname) == -1) {
1264 ret = pam_putenv(ctx->pamh, var);
1265 if (ret != PAM_SUCCESS) {
1266 _pam_log(ctx, LOG_ERR,
1267 "failed to set KRB5CCNAME to %s: %s",
1268 var, pam_strerror(ctx->pamh, ret));
1274 * Copy unix username if available (further processed in PAM).
1276 * @param ctx PAM winbind context
1277 * @param user_ret A pointer that holds a pointer to a string
1278 * @param unix_username A username
1283 static void _pam_setup_unix_username(struct pwb_context *ctx,
1285 struct wbcLogonUserInfo *info)
1287 const char *unix_username = NULL;
1290 if (!user_ret || !info) {
1294 for (i=0; i < info->num_blobs; i++) {
1295 if (strcasecmp(info->blobs[i].name, "unix_username") == 0) {
1296 unix_username = (const char *)info->blobs[i].blob.data;
1301 if (!unix_username || !unix_username[0]) {
1305 *user_ret = strdup(unix_username);
1309 * Set string into the PAM stack.
1311 * @param ctx PAM winbind context.
1312 * @param data_name Key name for pam_set_data.
1313 * @param value String value.
1318 static void _pam_set_data_string(struct pwb_context *ctx,
1319 const char *data_name,
1324 if (!data_name || !value || (strlen(data_name) == 0) ||
1325 (strlen(value) == 0)) {
1329 ret = pam_set_data(ctx->pamh, data_name, talloc_strdup(NULL, value),
1330 _pam_winbind_cleanup_func);
1331 if (ret != PAM_SUCCESS) {
1332 _pam_log_debug(ctx, LOG_DEBUG,
1333 "Could not set data %s: %s\n",
1334 data_name, pam_strerror(ctx->pamh, ret));
1339 * Set info3 strings into the PAM stack.
1341 * @param ctx PAM winbind context.
1342 * @param data_name Key name for pam_set_data.
1343 * @param value String value.
1348 static void _pam_set_data_info3(struct pwb_context *ctx,
1349 const struct wbcAuthUserInfo *info)
1351 _pam_set_data_string(ctx, PAM_WINBIND_HOMEDIR,
1352 info->home_directory);
1353 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSCRIPT,
1354 info->logon_script);
1355 _pam_set_data_string(ctx, PAM_WINBIND_LOGONSERVER,
1356 info->logon_server);
1357 _pam_set_data_string(ctx, PAM_WINBIND_PROFILEPATH,
1358 info->profile_path);
1362 * Free info3 strings in the PAM stack.
1364 * @param pamh PAM handle
1369 static void _pam_free_data_info3(pam_handle_t *pamh)
1371 pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
1372 pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
1373 pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
1374 pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
1378 * Send PAM_ERROR_MSG for cached or grace logons.
1380 * @param ctx PAM winbind context.
1381 * @param username User in PAM request.
1382 * @param info3_user_flgs Info3 flags containing logon type bits.
1387 static void _pam_warn_logon_type(struct pwb_context *ctx,
1388 const char *username,
1389 uint32_t info3_user_flgs)
1391 /* inform about logon type */
1392 if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
1394 _make_remark(ctx, PAM_ERROR_MSG,
1396 "Please change your password as soon you're "
1398 _pam_log_debug(ctx, LOG_DEBUG,
1399 "User %s logged on using grace logon\n",
1402 } else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
1404 _make_remark(ctx, PAM_ERROR_MSG,
1405 _("Domain Controller unreachable, "
1406 "using cached credentials instead. "
1407 "Network resources may be unavailable"));
1408 _pam_log_debug(ctx, LOG_DEBUG,
1409 "User %s logged on using cached credentials\n",
1415 * Send PAM_ERROR_MSG for krb5 errors.
1417 * @param ctx PAM winbind context.
1418 * @param username User in PAM request.
1419 * @param info3_user_flgs Info3 flags containing logon type bits.
1424 static void _pam_warn_krb5_failure(struct pwb_context *ctx,
1425 const char *username,
1426 uint32_t info3_user_flgs)
1428 if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
1429 _make_remark(ctx, PAM_ERROR_MSG,
1430 _("Failed to establish your Kerberos Ticket cache "
1431 "due time differences\n"
1432 "with the domain controller. "
1433 "Please verify the system time.\n"));
1434 _pam_log_debug(ctx, LOG_DEBUG,
1435 "User %s: Clock skew when getting Krb5 TGT\n",
1440 static bool _pam_check_remark_auth_err(struct pwb_context *ctx,
1441 const struct wbcAuthErrorInfo *e,
1442 const char *nt_status_string,
1445 const char *ntstatus = NULL;
1446 const char *error_string = NULL;
1448 if (!e || !pam_err) {
1452 ntstatus = e->nt_string;
1457 if (strcasecmp(ntstatus, nt_status_string) == 0) {
1459 error_string = _get_ntstatus_error_string(nt_status_string);
1461 _make_remark(ctx, PAM_ERROR_MSG, error_string);
1462 *pam_err = e->pam_error;
1466 if (e->display_string) {
1467 _make_remark(ctx, PAM_ERROR_MSG, _(e->display_string));
1468 *pam_err = e->pam_error;
1472 _make_remark(ctx, PAM_ERROR_MSG, nt_status_string);
1473 *pam_err = e->pam_error;
1482 * Compose Password Restriction String for a PAM_ERROR_MSG conversation.
1484 * @param i The wbcUserPasswordPolicyInfo struct.
1486 * @return string (caller needs to talloc_free).
1489 static char *_pam_compose_pwd_restriction_string(struct pwb_context *ctx,
1490 struct wbcUserPasswordPolicyInfo *i)
1498 str = talloc_asprintf(ctx, _("Your password "));
1503 if (i->min_length_password > 0) {
1504 str = talloc_asprintf_append(str,
1505 _("must be at least %d characters; "),
1506 i->min_length_password);
1512 if (i->password_history > 0) {
1513 str = talloc_asprintf_append(str,
1514 _("cannot repeat any of your previous %d "
1516 i->password_history);
1522 if (i->password_properties & WBC_DOMAIN_PASSWORD_COMPLEX) {
1523 str = talloc_asprintf_append(str,
1524 _("must contain capitals, numerals "
1526 "and cannot contain your account "
1533 str = talloc_asprintf_append(str,
1534 _("Please type a different password. "
1535 "Type a password which meets these requirements in "
1536 "both text boxes."));
1548 static int _pam_create_homedir(struct pwb_context *ctx,
1549 const char *dirname,
1554 if (stat(dirname, &sbuf) == 0) {
1558 if (mkdir(dirname, mode) != 0) {
1560 _make_remark_format(ctx, PAM_TEXT_INFO,
1561 _("Creating directory: %s failed: %s"),
1562 dirname, strerror(errno));
1563 _pam_log(ctx, LOG_ERR, "could not create dir: %s (%s)",
1564 dirname, strerror(errno));
1565 return PAM_PERM_DENIED;
1571 static int _pam_chown_homedir(struct pwb_context *ctx,
1572 const char *dirname,
1576 if (chown(dirname, uid, gid) != 0) {
1577 _pam_log(ctx, LOG_ERR, "failed to chown user homedir: %s (%s)",
1578 dirname, strerror(errno));
1579 return PAM_PERM_DENIED;
1585 static int _pam_mkhomedir(struct pwb_context *ctx)
1587 struct passwd *pwd = NULL;
1589 char *create_dir = NULL;
1590 char *user_dir = NULL;
1592 const char *username;
1594 char *safe_ptr = NULL;
1597 /* Get the username */
1598 ret = pam_get_user(ctx->pamh, &username, NULL);
1599 if ((ret != PAM_SUCCESS) || (!username)) {
1600 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1601 return PAM_SERVICE_ERR;
1604 pwd = getpwnam(username);
1606 _pam_log_debug(ctx, LOG_DEBUG, "can not get the username");
1607 return PAM_USER_UNKNOWN;
1609 _pam_log_debug(ctx, LOG_DEBUG, "homedir is: %s", pwd->pw_dir);
1611 ret = _pam_create_homedir(ctx, pwd->pw_dir, 0700);
1612 if (ret == PAM_SUCCESS) {
1613 ret = _pam_chown_homedir(ctx, pwd->pw_dir,
1618 if (ret == PAM_SUCCESS) {
1622 /* maybe we need to create parent dirs */
1623 create_dir = talloc_strdup(ctx, "/");
1628 /* find final directory */
1629 user_dir = strrchr(pwd->pw_dir, '/');
1635 _pam_log(ctx, LOG_DEBUG, "final directory: %s", user_dir);
1639 while ((token = strtok_r(p, "/", &safe_ptr)) != NULL) {
1645 _pam_log_debug(ctx, LOG_DEBUG, "token is %s", token);
1647 create_dir = talloc_asprintf_append(create_dir, "%s/", token);
1651 _pam_log_debug(ctx, LOG_DEBUG, "current_dir is %s", create_dir);
1653 if (strcmp(token, user_dir) == 0) {
1654 _pam_log_debug(ctx, LOG_DEBUG, "assuming last directory: %s", token);
1658 ret = _pam_create_homedir(ctx, create_dir, mode);
1659 if (ret != PAM_SUCCESS) {
1664 return _pam_chown_homedir(ctx, create_dir,
1669 /* talk to winbindd */
1670 static int winbind_auth_request(struct pwb_context *ctx,
1675 const int warn_pwd_expire,
1676 struct wbcAuthErrorInfo **p_error,
1677 struct wbcLogonUserInfo **p_info,
1678 struct wbcUserPasswordPolicyInfo **p_policy,
1679 time_t *pwd_last_set,
1684 struct wbcLogonUserParams logon;
1685 char membership_of[1024];
1686 uid_t user_uid = -1;
1687 uint32_t flags = WBFLAG_PAM_INFO3_TEXT |
1688 WBFLAG_PAM_GET_PWD_POLICY;
1690 struct wbcLogonUserInfo *info = NULL;
1691 struct wbcAuthUserInfo *user_info = NULL;
1692 struct wbcAuthErrorInfo *error = NULL;
1693 struct wbcUserPasswordPolicyInfo *policy = NULL;
1695 int ret = PAM_AUTH_ERR;
1697 const char *codes[] = {
1698 "NT_STATUS_PASSWORD_EXPIRED",
1699 "NT_STATUS_PASSWORD_MUST_CHANGE",
1700 "NT_STATUS_INVALID_WORKSTATION",
1701 "NT_STATUS_INVALID_LOGON_HOURS",
1702 "NT_STATUS_ACCOUNT_EXPIRED",
1703 "NT_STATUS_ACCOUNT_DISABLED",
1704 "NT_STATUS_ACCOUNT_LOCKED_OUT",
1705 "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT",
1706 "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT",
1707 "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT",
1708 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1709 "NT_STATUS_NO_LOGON_SERVERS",
1710 "NT_STATUS_WRONG_PASSWORD",
1711 "NT_STATUS_ACCESS_DENIED"
1718 /* Krb5 auth always has to go against the KDC of the user's realm */
1720 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1721 flags |= WBFLAG_PAM_CONTACT_TRUSTDOM;
1724 if (ctx->ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
1725 struct passwd *pwd = NULL;
1727 pwd = getpwnam(user);
1729 return PAM_USER_UNKNOWN;
1731 user_uid = pwd->pw_uid;
1734 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1736 _pam_log_debug(ctx, LOG_DEBUG,
1737 "enabling krb5 login flag\n");
1739 flags |= WBFLAG_PAM_KRB5 |
1740 WBFLAG_PAM_FALLBACK_AFTER_KRB5;
1743 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1744 _pam_log_debug(ctx, LOG_DEBUG,
1745 "enabling cached login flag\n");
1746 flags |= WBFLAG_PAM_CACHED_LOGIN;
1751 flags |= WBFLAG_PAM_UNIX_NAME;
1754 if (cctype != NULL) {
1755 _pam_log_debug(ctx, LOG_DEBUG,
1756 "enabling request for a %s krb5 ccache\n",
1760 if (member != NULL) {
1762 ZERO_STRUCT(membership_of);
1764 if (!winbind_name_list_to_sid_string_list(ctx, user, member,
1766 sizeof(membership_of))) {
1767 _pam_log_debug(ctx, LOG_ERR,
1768 "failed to serialize membership of sid "
1769 "\"%s\"\n", member);
1770 return PAM_AUTH_ERR;
1776 logon.username = user;
1777 logon.password = pass;
1780 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1784 discard_const_p(uint8_t, cctype),
1786 if (!WBC_ERROR_IS_OK(wbc_status)) {
1791 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1797 if (!WBC_ERROR_IS_OK(wbc_status)) {
1801 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1805 (uint8_t *)&user_uid,
1807 if (!WBC_ERROR_IS_OK(wbc_status)) {
1812 wbc_status = wbcAddNamedBlob(&logon.num_blobs,
1816 (uint8_t *)membership_of,
1817 sizeof(membership_of));
1818 if (!WBC_ERROR_IS_OK(wbc_status)) {
1823 wbc_status = wbcLogonUser(&logon, &info, &error, &policy);
1824 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1825 user, "wbcLogonUser");
1826 wbcFreeMemory(logon.blobs);
1829 if (info && info->info) {
1830 user_info = info->info;
1833 if (pwd_last_set && user_info) {
1834 *pwd_last_set = user_info->pass_last_set_time;
1837 if (p_info && info) {
1841 if (p_policy && policy) {
1845 if (p_error && error) {
1846 /* We want to process the error in the caller. */
1851 for (i=0; i<ARRAY_SIZE(codes); i++) {
1853 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1859 if ((ret == PAM_SUCCESS) && user_info && policy && info) {
1861 bool already_expired = false;
1862 bool change_pwd = false;
1864 /* warn a user if the password is about to expire soon */
1865 _pam_warn_password_expiry(ctx, user_info, policy,
1870 if (already_expired == true) {
1872 SMB_TIME_T last_set = user_info->pass_last_set_time;
1874 _pam_log_debug(ctx, LOG_DEBUG,
1875 "Password has expired "
1876 "(Password was last set: %lld, "
1877 "the policy says it should expire here "
1878 "%lld (now it's: %ld))\n",
1879 (long long int)last_set,
1880 (long long int)last_set +
1884 return PAM_AUTHTOK_EXPIRED;
1888 ret = PAM_NEW_AUTHTOK_REQD;
1892 /* inform about logon type */
1893 _pam_warn_logon_type(ctx, user, user_info->user_flags);
1895 /* inform about krb5 failures */
1896 _pam_warn_krb5_failure(ctx, user, user_info->user_flags);
1898 /* set some info3 info for other modules in the stack */
1899 _pam_set_data_info3(ctx, user_info);
1901 /* put krb5ccname into env */
1902 _pam_setup_krb5_env(ctx, info);
1904 /* If winbindd returned a username, return the pointer to it
1906 _pam_setup_unix_username(ctx, user_ret, info);
1910 wbcFreeMemory(logon.blobs);
1911 if (info && info->blobs && !p_info) {
1912 wbcFreeMemory(info->blobs);
1914 if (error && !p_error) {
1915 wbcFreeMemory(error);
1917 if (info && !p_info) {
1918 wbcFreeMemory(info);
1920 if (policy && !p_policy) {
1921 wbcFreeMemory(policy);
1927 /* talk to winbindd */
1928 static int winbind_chauthtok_request(struct pwb_context *ctx,
1930 const char *oldpass,
1931 const char *newpass,
1932 time_t pwd_last_set)
1935 struct wbcChangePasswordParams params;
1936 struct wbcAuthErrorInfo *error = NULL;
1937 struct wbcUserPasswordPolicyInfo *policy = NULL;
1938 enum wbcPasswordChangeRejectReason reject_reason = -1;
1942 const char *codes[] = {
1943 "NT_STATUS_BACKUP_CONTROLLER",
1944 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
1945 "NT_STATUS_NO_LOGON_SERVERS",
1946 "NT_STATUS_ACCESS_DENIED",
1947 "NT_STATUS_PWD_TOO_SHORT", /* TODO: tell the min pwd length ? */
1948 "NT_STATUS_PWD_TOO_RECENT", /* TODO: tell the minage ? */
1949 "NT_STATUS_PWD_HISTORY_CONFLICT" /* TODO: tell the history length ? */
1951 int ret = PAM_AUTH_ERR;
1953 ZERO_STRUCT(params);
1955 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
1956 flags |= WBFLAG_PAM_KRB5 |
1957 WBFLAG_PAM_CONTACT_TRUSTDOM;
1960 if (ctx->ctrl & WINBIND_CACHED_LOGIN) {
1961 flags |= WBFLAG_PAM_CACHED_LOGIN;
1964 params.account_name = user;
1965 params.level = WBC_CHANGE_PASSWORD_LEVEL_PLAIN;
1966 params.old_password.plaintext = oldpass;
1967 params.new_password.plaintext = newpass;
1968 params.flags = flags;
1970 wbc_status = wbcChangeUserPasswordEx(¶ms, &error, &reject_reason, &policy);
1971 ret = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
1972 user, "wbcChangeUserPasswordEx");
1974 if (WBC_ERROR_IS_OK(wbc_status)) {
1975 _pam_log(ctx, LOG_NOTICE,
1976 "user '%s' password changed", user);
1981 wbcFreeMemory(policy);
1985 for (i=0; i<ARRAY_SIZE(codes); i++) {
1987 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
1993 if (!strcasecmp(error->nt_string,
1994 "NT_STATUS_PASSWORD_RESTRICTION")) {
1996 char *pwd_restriction_string = NULL;
1997 SMB_TIME_T min_pwd_age = 0;
2000 min_pwd_age = policy->min_passwordage;
2003 /* FIXME: avoid to send multiple PAM messages after another */
2004 switch ((int)reject_reason) {
2007 case WBC_PWD_CHANGE_NO_ERROR:
2008 if ((min_pwd_age > 0) &&
2009 (pwd_last_set + min_pwd_age > time(NULL))) {
2010 PAM_WB_REMARK_DIRECT(ctx,
2011 "NT_STATUS_PWD_TOO_RECENT");
2014 case WBC_PWD_CHANGE_PASSWORD_TOO_SHORT:
2015 PAM_WB_REMARK_DIRECT(ctx,
2016 "NT_STATUS_PWD_TOO_SHORT");
2018 case WBC_PWD_CHANGE_PWD_IN_HISTORY:
2019 PAM_WB_REMARK_DIRECT(ctx,
2020 "NT_STATUS_PWD_HISTORY_CONFLICT");
2022 case WBC_PWD_CHANGE_NOT_COMPLEX:
2023 _make_remark(ctx, PAM_ERROR_MSG,
2024 _("Password does not meet "
2025 "complexity requirements"));
2028 _pam_log_debug(ctx, LOG_DEBUG,
2029 "unknown password change "
2030 "reject reason: %d",
2035 pwd_restriction_string =
2036 _pam_compose_pwd_restriction_string(ctx, policy);
2037 if (pwd_restriction_string) {
2038 _make_remark(ctx, PAM_ERROR_MSG,
2039 pwd_restriction_string);
2040 TALLOC_FREE(pwd_restriction_string);
2044 wbcFreeMemory(error);
2045 wbcFreeMemory(policy);
2051 * Checks if a user has an account
2054 * 1 = User not found
2058 static int valid_user(struct pwb_context *ctx,
2061 /* check not only if the user is available over NSS calls, also make
2062 * sure it's really a winbind user, this is important when stacking PAM
2063 * modules in the 'account' or 'password' facility. */
2066 struct passwd *pwd = NULL;
2067 struct passwd *wb_pwd = NULL;
2069 pwd = getpwnam(user);
2074 wbc_status = wbcGetpwnam(user, &wb_pwd);
2075 wbcFreeMemory(wb_pwd);
2076 if (!WBC_ERROR_IS_OK(wbc_status)) {
2077 _pam_log(ctx, LOG_DEBUG, "valid_user: wbcGetpwnam gave %s\n",
2078 wbcErrorString(wbc_status));
2081 switch (wbc_status) {
2082 case WBC_ERR_UNKNOWN_USER:
2083 /* match other insane libwbclient return codes */
2084 case WBC_ERR_WINBIND_NOT_AVAILABLE:
2085 case WBC_ERR_DOMAIN_NOT_FOUND:
2087 case WBC_ERR_SUCCESS:
2095 static char *_pam_delete(register char *xx)
2103 * obtain a password from the user
2106 static int _winbind_read_password(struct pwb_context *ctx,
2108 const char *comment,
2109 const char *prompt1,
2110 const char *prompt2,
2118 _pam_log(ctx, LOG_DEBUG, "getting password (0x%08x)", ctrl);
2121 * make sure nothing inappropriate gets returned
2124 *pass = token = NULL;
2127 * which authentication token are we getting?
2130 if (on(WINBIND__OLD_PASSWORD, ctrl)) {
2131 authtok_flag = PAM_OLDAUTHTOK;
2133 authtok_flag = PAM_AUTHTOK;
2137 * should we obtain the password from a PAM item ?
2140 if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) ||
2141 on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2142 retval = pam_get_item(ctx->pamh,
2144 (const void **) &item);
2145 if (retval != PAM_SUCCESS) {
2147 _pam_log(ctx, LOG_ALERT,
2148 "pam_get_item returned error "
2149 "to unix-read-password");
2151 } else if (item != NULL) { /* we have a password! */
2154 _pam_log(ctx, LOG_DEBUG,
2155 "pam_get_item returned a password");
2157 } else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
2158 return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
2159 } else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
2160 && off(WINBIND__OLD_PASSWORD, ctrl)) {
2161 return PAM_AUTHTOK_RECOVER_ERR;
2165 * getting here implies we will have to get the password from the
2170 struct pam_message msg[3], *pmsg[3];
2171 struct pam_response *resp;
2174 /* prepare to converse */
2176 if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
2178 msg[0].msg_style = PAM_TEXT_INFO;
2179 msg[0].msg = discard_const_p(char, comment);
2186 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2187 msg[i++].msg = discard_const_p(char, prompt1);
2190 if (prompt2 != NULL) {
2192 msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
2193 msg[i++].msg = discard_const_p(char, prompt2);
2196 /* so call the conversation expecting i responses */
2198 retval = converse(ctx->pamh, i, pmsg, &resp);
2200 if (retval == PAM_SUCCESS) {
2201 retval = PAM_AUTHTOK_RECOVER_ERR;
2205 if (retval != PAM_SUCCESS) {
2206 _pam_drop_reply(resp, i);
2210 /* interpret the response */
2212 token = x_strdup(resp[i - replies].resp);
2214 _pam_log(ctx, LOG_NOTICE,
2215 "could not recover "
2216 "authentication token");
2217 retval = PAM_AUTHTOK_RECOVER_ERR;
2222 /* verify that password entered correctly */
2223 if (!resp[i - 1].resp ||
2224 strcmp(token, resp[i - 1].resp)) {
2225 _pam_delete(token); /* mistyped */
2226 retval = PAM_AUTHTOK_RECOVER_ERR;
2227 _make_remark(ctx, PAM_ERROR_MSG,
2233 * tidy up the conversation (resp_retcode) is ignored
2234 * -- what is it for anyway? AGM
2236 _pam_drop_reply(resp, i);
2240 if (retval != PAM_SUCCESS) {
2241 _pam_log_debug(ctx, LOG_DEBUG,
2242 "unable to obtain a password");
2245 /* 'token' is the entered password */
2247 /* we store this password as an item */
2249 retval = pam_set_item(ctx->pamh, authtok_flag, token);
2250 _pam_delete(token); /* clean it up */
2251 if (retval != PAM_SUCCESS ||
2252 (retval = pam_get_item(ctx->pamh, authtok_flag, (const void **) &item)) != PAM_SUCCESS) {
2254 _pam_log(ctx, LOG_CRIT, "error manipulating password");
2260 item = NULL; /* break link to password */
2265 static const char *get_conf_item_string(struct pwb_context *ctx,
2270 const char *parm_opt = NULL;
2272 if (!(ctx->ctrl & config_flag)) {
2276 /* let the pam opt take precedence over the pam_winbind.conf option */
2277 for (i=0; i<ctx->argc; i++) {
2279 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2282 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2283 _pam_log(ctx, LOG_INFO,
2284 "no \"=\" delimiter for \"%s\" found\n",
2288 _pam_log_debug(ctx, LOG_INFO,
2289 "PAM config: %s '%s'\n", item, p+1);
2297 key = talloc_asprintf(ctx, "global:%s", item);
2302 parm_opt = tiniparser_getstring_nonempty(ctx->dict, key, NULL);
2305 _pam_log_debug(ctx, LOG_INFO, "CONFIG file: %s '%s'\n",
2312 static int get_config_item_int(struct pwb_context *ctx,
2316 int i, parm_opt = -1;
2318 if (!(ctx->ctrl & config_flag)) {
2322 /* let the pam opt take precedence over the pam_winbind.conf option */
2323 for (i = 0; i < ctx->argc; i++) {
2325 if ((strncmp(ctx->argv[i], item, strlen(item)) == 0)) {
2328 if ((p = strchr(ctx->argv[i], '=')) == NULL) {
2329 _pam_log(ctx, LOG_INFO,
2330 "no \"=\" delimiter for \"%s\" found\n",
2334 parm_opt = atoi(p + 1);
2335 _pam_log_debug(ctx, LOG_INFO,
2336 "PAM config: %s '%d'\n",
2345 key = talloc_asprintf(ctx, "global:%s", item);
2350 parm_opt = tiniparser_getint(ctx->dict, key, -1);
2353 _pam_log_debug(ctx, LOG_INFO,
2354 "CONFIG file: %s '%d'\n",
2361 static const char *get_krb5_cc_type_from_config(struct pwb_context *ctx)
2363 return get_conf_item_string(ctx, "krb5_ccache_type",
2364 WINBIND_KRB5_CCACHE_TYPE);
2367 static const char *get_member_from_config(struct pwb_context *ctx)
2369 const char *ret = NULL;
2370 ret = get_conf_item_string(ctx, "require_membership_of",
2371 WINBIND_REQUIRED_MEMBERSHIP);
2375 return get_conf_item_string(ctx, "require-membership-of",
2376 WINBIND_REQUIRED_MEMBERSHIP);
2379 static int get_warn_pwd_expire_from_config(struct pwb_context *ctx)
2382 ret = get_config_item_int(ctx, "warn_pwd_expire",
2383 WINBIND_WARN_PWD_EXPIRE);
2384 /* no or broken setting */
2386 return DEFAULT_DAYS_TO_WARN_BEFORE_PWD_EXPIRES;
2392 * Retrieve the winbind separator.
2394 * @param ctx PAM winbind context.
2396 * @return string separator character. NULL on failure.
2399 static char winbind_get_separator(struct pwb_context *ctx)
2402 static struct wbcInterfaceDetails *details = NULL;
2404 wbc_status = wbcInterfaceDetails(&details);
2405 if (!WBC_ERROR_IS_OK(wbc_status)) {
2406 _pam_log(ctx, LOG_ERR,
2407 "Could not retrieve winbind interface details: %s",
2408 wbcErrorString(wbc_status));
2416 return details->winbind_separator;
2421 * Convert a upn to a name.
2423 * @param ctx PAM winbind context.
2424 * @param upn User UPN to be translated.
2426 * @return converted name. NULL pointer on failure. Caller needs to free.
2429 static char* winbind_upn_to_username(struct pwb_context *ctx,
2433 wbcErr wbc_status = WBC_ERR_UNKNOWN_FAILURE;
2434 struct wbcDomainSid sid;
2435 enum wbcSidType type;
2436 char *domain = NULL;
2441 /* This cannot work when the winbind separator = @ */
2443 sep = winbind_get_separator(ctx);
2444 if (!sep || sep == '@') {
2448 name = talloc_strdup(ctx, upn);
2452 if ((p = strchr(name, '@')) != NULL) {
2457 /* Convert the UPN to a SID */
2459 wbc_status = wbcLookupName(domain, name, &sid, &type);
2460 if (!WBC_ERROR_IS_OK(wbc_status)) {
2464 /* Convert the the SID back to the sAMAccountName */
2466 wbc_status = wbcLookupSid(&sid, &domain, &name, &type);
2467 if (!WBC_ERROR_IS_OK(wbc_status)) {
2471 result = talloc_asprintf(ctx, "%s%c%s", domain, sep, name);
2472 wbcFreeMemory(domain);
2473 wbcFreeMemory(name);
2477 static int _pam_delete_cred(pam_handle_t *pamh, int flags,
2478 int argc, enum pam_winbind_request_type type,
2481 int retval = PAM_SUCCESS;
2482 struct pwb_context *ctx = NULL;
2483 struct wbcLogoffUserParams logoff;
2484 struct wbcAuthErrorInfo *error = NULL;
2486 wbcErr wbc_status = WBC_ERR_SUCCESS;
2488 ZERO_STRUCT(logoff);
2490 retval = _pam_winbind_init_context(pamh, flags, argc, argv, type, &ctx);
2491 if (retval != PAM_SUCCESS) {
2495 _PAM_LOG_FUNCTION_ENTER("_pam_delete_cred", ctx);
2497 if (ctx->ctrl & WINBIND_KRB5_AUTH) {
2499 /* destroy the ccache here */
2501 uint32_t wbc_flags = 0;
2502 const char *ccname = NULL;
2503 struct passwd *pwd = NULL;
2505 retval = pam_get_user(pamh, &user, _("Username: "));
2506 if (retval != PAM_SUCCESS) {
2507 _pam_log(ctx, LOG_ERR,
2508 "could not identify user");
2513 _pam_log(ctx, LOG_ERR,
2514 "username was NULL!");
2515 retval = PAM_USER_UNKNOWN;
2519 _pam_log_debug(ctx, LOG_DEBUG,
2520 "username [%s] obtained", user);
2522 ccname = pam_getenv(pamh, "KRB5CCNAME");
2523 if (ccname == NULL) {
2524 _pam_log_debug(ctx, LOG_DEBUG,
2525 "user has no KRB5CCNAME environment");
2528 pwd = getpwnam(user);
2530 retval = PAM_USER_UNKNOWN;
2534 wbc_flags = WBFLAG_PAM_KRB5 |
2535 WBFLAG_PAM_CONTACT_TRUSTDOM;
2537 logoff.username = user;
2540 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2544 discard_const_p(uint8_t, ccname),
2546 if (!WBC_ERROR_IS_OK(wbc_status)) {
2551 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2555 (uint8_t *)&wbc_flags,
2557 if (!WBC_ERROR_IS_OK(wbc_status)) {
2561 wbc_status = wbcAddNamedBlob(&logoff.num_blobs,
2565 (uint8_t *)&pwd->pw_uid,
2566 sizeof(pwd->pw_uid));
2567 if (!WBC_ERROR_IS_OK(wbc_status)) {
2571 wbc_status = wbcLogoffUserEx(&logoff, &error);
2572 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2573 user, "wbcLogoffUser");
2574 wbcFreeMemory(error);
2575 wbcFreeMemory(logoff.blobs);
2576 logoff.blobs = NULL;
2578 if (!WBC_ERROR_IS_OK(wbc_status)) {
2579 _pam_log(ctx, LOG_INFO,
2580 "failed to logoff user %s: %s\n",
2581 user, wbcErrorString(wbc_status));
2587 wbcFreeMemory(logoff.blobs);
2590 if (!WBC_ERROR_IS_OK(wbc_status)) {
2591 retval = wbc_auth_error_to_pam_error(ctx, error, wbc_status,
2592 user, "wbcLogoffUser");
2596 * Delete the krb5 ccname variable from the PAM environment
2597 * if it was set by winbind.
2599 if ((ctx->ctrl & WINBIND_KRB5_AUTH) && pam_getenv(pamh, "KRB5CCNAME")) {
2600 pam_putenv(pamh, "KRB5CCNAME");
2603 _PAM_LOG_FUNCTION_LEAVE("_pam_delete_cred", ctx, retval);
2611 int pam_sm_authenticate(pam_handle_t *pamh, int flags,
2612 int argc, const char **argv)
2614 const char *username;
2615 const char *password;
2616 const char *member = NULL;
2617 const char *cctype = NULL;
2618 int warn_pwd_expire;
2619 int retval = PAM_AUTH_ERR;
2620 char *username_ret = NULL;
2621 char *new_authtok_required = NULL;
2622 char *real_username = NULL;
2623 struct pwb_context *ctx = NULL;
2625 retval = _pam_winbind_init_context(pamh, flags, argc, argv,
2626 PAM_WINBIND_AUTHENTICATE, &ctx);
2627 if (retval != PAM_SUCCESS) {
2631 _PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", ctx);
2633 /* Get the username */
2634 retval = pam_get_user(pamh, &username, NULL);
2635 if ((retval != PAM_SUCCESS) || (!username)) {
2636 _pam_log_debug(ctx, LOG_DEBUG,
2637 "can not get the username");
2638 retval = PAM_SERVICE_ERR;
2644 /* Decode the user name since AIX does not support logn user
2645 names by default. The name is encoded as _#uid. */
2647 if (username[0] == '_') {
2648 uid_t id = atoi(&username[1]);
2649 struct passwd *pw = NULL;
2651 if ((id!=0) && ((pw = getpwuid(id)) != NULL)) {
2652 real_username = strdup(pw->pw_name);
2657 if (!real_username) {
2658 /* Just making a copy of the username we got from PAM */
2659 if ((real_username = strdup(username)) == NULL) {
2660 _pam_log_debug(ctx, LOG_DEBUG,
2661 "memory allocation failure when copying "
2663 retval = PAM_SERVICE_ERR;
2668 /* Maybe this was a UPN */
2670 if (strchr(real_username, '@') != NULL) {
2671 char *samaccountname = NULL;
2673 samaccountname = winbind_upn_to_username(ctx,
2675 if (samaccountname) {
2676 free(real_username);
2677 real_username = strdup(samaccountname);
2681 retval = _winbind_read_password(ctx, ctx->ctrl, NULL,
2682 _("Password: "), NULL,
2685 if (retval != PAM_SUCCESS) {
2686 _pam_log(ctx, LOG_ERR,
2687 "Could not retrieve user's password");
2688 retval = PAM_AUTHTOK_ERR;
2692 /* Let's not give too much away in the log file */
2694 #ifdef DEBUG_PASSWORD
2695 _pam_log_debug(ctx, LOG_INFO,
2696 "Verify user '%s' with password '%s'",
2697 real_username, password);
2699 _pam_log_debug(ctx, LOG_INFO,
2700 "Verify user '%s'", real_username);
2703 member = get_member_from_config(ctx);
2704 cctype = get_krb5_cc_type_from_config(ctx);
2705 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
2707 /* Now use the username to look up password */
2708 retval = winbind_auth_request(ctx, real_username, password,
2709 member, cctype, warn_pwd_expire,
2711 NULL, &username_ret);
2713 if (retval == PAM_NEW_AUTHTOK_REQD ||
2714 retval == PAM_AUTHTOK_EXPIRED) {
2716 char *new_authtok_required_during_auth = NULL;
2718 new_authtok_required = talloc_asprintf(NULL, "%d", retval);
2719 if (!new_authtok_required) {
2720 retval = PAM_BUF_ERR;
2724 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2725 new_authtok_required,
2726 _pam_winbind_cleanup_func);
2728 retval = PAM_SUCCESS;
2730 new_authtok_required_during_auth = talloc_asprintf(NULL, "%d", true);
2731 if (!new_authtok_required_during_auth) {
2732 retval = PAM_BUF_ERR;
2736 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2737 new_authtok_required_during_auth,
2738 _pam_winbind_cleanup_func);
2745 pam_set_item (pamh, PAM_USER, username_ret);
2746 _pam_log_debug(ctx, LOG_INFO,
2747 "Returned user was '%s'", username_ret);
2751 if (real_username) {
2752 free(real_username);
2755 if (!new_authtok_required) {
2756 pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
2759 if (retval != PAM_SUCCESS) {
2760 _pam_free_data_info3(pamh);
2763 _PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", ctx, retval);
2771 int pam_sm_setcred(pam_handle_t *pamh, int flags,
2772 int argc, const char **argv)
2774 int ret = PAM_SYSTEM_ERR;
2775 struct pwb_context *ctx = NULL;
2777 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2778 PAM_WINBIND_SETCRED, &ctx);
2779 if (ret != PAM_SUCCESS) {
2783 _PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", ctx);
2785 switch (flags & ~PAM_SILENT) {
2787 case PAM_DELETE_CRED:
2788 ret = _pam_delete_cred(pamh, flags, argc,
2789 PAM_WINBIND_SETCRED, argv);
2791 case PAM_REFRESH_CRED:
2792 _pam_log_debug(ctx, LOG_WARNING,
2793 "PAM_REFRESH_CRED not implemented");
2796 case PAM_REINITIALIZE_CRED:
2797 _pam_log_debug(ctx, LOG_WARNING,
2798 "PAM_REINITIALIZE_CRED not implemented");
2801 case PAM_ESTABLISH_CRED:
2802 _pam_log_debug(ctx, LOG_WARNING,
2803 "PAM_ESTABLISH_CRED not implemented");
2807 ret = PAM_SYSTEM_ERR;
2811 _PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", ctx, ret);
2819 * Account management. We want to verify that the account exists
2820 * before returning PAM_SUCCESS
2823 int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
2824 int argc, const char **argv)
2826 const char *username;
2827 int ret = PAM_USER_UNKNOWN;
2828 const char *tmp = NULL;
2829 struct pwb_context *ctx = NULL;
2831 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2832 PAM_WINBIND_ACCT_MGMT, &ctx);
2833 if (ret != PAM_SUCCESS) {
2837 _PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", ctx);
2840 /* Get the username */
2841 ret = pam_get_user(pamh, &username, NULL);
2842 if ((ret != PAM_SUCCESS) || (!username)) {
2843 _pam_log_debug(ctx, LOG_DEBUG,
2844 "can not get the username");
2845 ret = PAM_SERVICE_ERR;
2849 /* Verify the username */
2850 ret = valid_user(ctx, username);
2853 /* some sort of system error. The log was already printed */
2854 ret = PAM_SERVICE_ERR;
2857 /* the user does not exist */
2858 _pam_log_debug(ctx, LOG_NOTICE, "user '%s' not found",
2860 if (ctx->ctrl & WINBIND_UNKNOWN_OK_ARG) {
2864 ret = PAM_USER_UNKNOWN;
2867 pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD,
2868 (const void **)&tmp);
2872 case PAM_AUTHTOK_EXPIRED:
2873 /* fall through, since new token is required in this case */
2874 case PAM_NEW_AUTHTOK_REQD:
2875 _pam_log(ctx, LOG_WARNING,
2876 "pam_sm_acct_mgmt success but %s is set",
2877 PAM_WINBIND_NEW_AUTHTOK_REQD);
2878 _pam_log(ctx, LOG_NOTICE,
2879 "user '%s' needs new password",
2881 /* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
2882 ret = PAM_NEW_AUTHTOK_REQD;
2885 _pam_log(ctx, LOG_WARNING,
2886 "pam_sm_acct_mgmt success");
2887 _pam_log(ctx, LOG_NOTICE,
2888 "user '%s' granted access", username);
2894 /* Otherwise, the authentication looked good */
2895 _pam_log(ctx, LOG_NOTICE,
2896 "user '%s' granted access", username);
2900 /* we don't know anything about this return value */
2901 _pam_log(ctx, LOG_ERR,
2902 "internal module error (ret = %d, user = '%s')",
2904 ret = PAM_SERVICE_ERR;
2908 /* should not be reached */
2913 _PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", ctx, ret);
2921 int pam_sm_open_session(pam_handle_t *pamh, int flags,
2922 int argc, const char **argv)
2924 int ret = PAM_SUCCESS;
2925 struct pwb_context *ctx = NULL;
2927 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2928 PAM_WINBIND_OPEN_SESSION, &ctx);
2929 if (ret != PAM_SUCCESS) {
2933 _PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", ctx);
2935 if (ctx->ctrl & WINBIND_MKHOMEDIR) {
2936 /* check and create homedir */
2937 ret = _pam_mkhomedir(ctx);
2940 _PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", ctx, ret);
2948 int pam_sm_close_session(pam_handle_t *pamh, int flags,
2949 int argc, const char **argv)
2951 int ret = PAM_SUCCESS;
2952 struct pwb_context *ctx = NULL;
2954 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
2955 PAM_WINBIND_CLOSE_SESSION, &ctx);
2956 if (ret != PAM_SUCCESS) {
2960 _PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", ctx);
2962 _PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", ctx, ret);
2970 * evaluate whether we need to re-authenticate with kerberos after a
2973 * @param ctx PAM winbind context.
2974 * @param user The username
2976 * @return boolean Returns true if required, false if not.
2979 static bool _pam_require_krb5_auth_after_chauthtok(struct pwb_context *ctx,
2983 /* Make sure that we only do this if a) the chauthtok got initiated
2984 * during a logon attempt (authenticate->acct_mgmt->chauthtok) b) any
2985 * later password change via the "passwd" command if done by the user
2987 * NB. If we login from gdm or xdm and the password expires,
2988 * we change the password, but there is no memory cache.
2989 * Thus, even for passthrough login, we should do the
2990 * authentication again to update memory cache.
2994 char *new_authtok_reqd_during_auth = NULL;
2995 struct passwd *pwd = NULL;
2997 pam_get_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
2998 (const void **) &new_authtok_reqd_during_auth);
2999 pam_set_data(ctx->pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
3002 if (new_authtok_reqd_during_auth) {
3006 pwd = getpwnam(user);
3011 if (getuid() == pwd->pw_uid) {
3020 int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
3021 int argc, const char **argv)
3025 bool cached_login = false;
3027 /* <DO NOT free() THESE> */
3029 const char *pass_old;
3030 const char *pass_new;
3031 /* </DO NOT free() THESE> */
3036 char *username_ret = NULL;
3037 struct wbcAuthErrorInfo *error = NULL;
3038 struct pwb_context *ctx = NULL;
3040 ret = _pam_winbind_init_context(pamh, flags, argc, argv,
3041 PAM_WINBIND_CHAUTHTOK, &ctx);
3042 if (ret != PAM_SUCCESS) {
3046 _PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", ctx);
3048 cached_login = (ctx->ctrl & WINBIND_CACHED_LOGIN);
3050 /* clearing offline bit for auth */
3051 ctx->ctrl &= ~WINBIND_CACHED_LOGIN;
3054 * First get the name of a user
3056 ret = pam_get_user(pamh, &user, _("Username: "));
3057 if (ret != PAM_SUCCESS) {
3058 _pam_log(ctx, LOG_ERR,
3059 "password - could not identify user");
3064 _pam_log(ctx, LOG_ERR, "username was NULL!");
3065 ret = PAM_USER_UNKNOWN;
3069 _pam_log_debug(ctx, LOG_DEBUG, "username [%s] obtained", user);
3071 /* check if this is really a user in winbindd, not only in NSS */
3072 ret = valid_user(ctx, user);
3075 ret = PAM_USER_UNKNOWN;
3078 ret = PAM_SYSTEM_ERR;
3085 * obtain and verify the current password (OLDAUTHTOK) for
3089 if (flags & PAM_PRELIM_CHECK) {
3090 time_t pwdlastset_prelim = 0;
3092 /* instruct user what is happening */
3094 #define greeting _("Changing password for")
3095 Announce = talloc_asprintf(ctx, "%s %s", greeting, user);
3097 _pam_log(ctx, LOG_CRIT,
3098 "password - out of memory");
3104 lctrl = ctx->ctrl | WINBIND__OLD_PASSWORD;
3105 ret = _winbind_read_password(ctx, lctrl,
3107 _("(current) NT password: "),
3109 (const char **) &pass_old);
3110 TALLOC_FREE(Announce);
3111 if (ret != PAM_SUCCESS) {
3112 _pam_log(ctx, LOG_NOTICE,
3113 "password - (old) token not obtained");
3117 /* verify that this is the password for this user */
3119 ret = winbind_auth_request(ctx, user, pass_old,
3122 &pwdlastset_prelim, NULL);
3124 if (ret != PAM_ACCT_EXPIRED &&
3125 ret != PAM_AUTHTOK_EXPIRED &&
3126 ret != PAM_NEW_AUTHTOK_REQD &&
3127 ret != PAM_SUCCESS) {
3132 pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3133 (void *)pwdlastset_prelim, NULL);
3135 ret = pam_set_item(pamh, PAM_OLDAUTHTOK,
3136 (const void *) pass_old);
3138 if (ret != PAM_SUCCESS) {
3139 _pam_log(ctx, LOG_CRIT,
3140 "failed to set PAM_OLDAUTHTOK");
3142 } else if (flags & PAM_UPDATE_AUTHTOK) {
3144 time_t pwdlastset_update = 0;
3147 * obtain the proposed password
3151 * get the old token back.
3154 ret = pam_get_item(pamh, PAM_OLDAUTHTOK, (const void **) &pass_old);
3156 if (ret != PAM_SUCCESS) {
3157 _pam_log(ctx, LOG_NOTICE,
3158 "user not authenticated");
3162 lctrl = ctx->ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
3164 if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
3165 lctrl |= WINBIND_USE_FIRST_PASS_ARG;
3168 ret = PAM_AUTHTOK_ERR;
3169 while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
3171 * use_authtok is to force the use of a previously entered
3172 * password -- needed for pluggable password strength checking
3175 ret = _winbind_read_password(ctx, lctrl,
3177 _("Enter new NT password: "),
3178 _("Retype new NT password: "),
3179 (const char **)&pass_new);
3181 if (ret != PAM_SUCCESS) {
3182 _pam_log_debug(ctx, LOG_ALERT,
3184 "new password not obtained");
3185 pass_old = NULL;/* tidy up */
3190 * At this point we know who the user is and what they
3191 * propose as their new password. Verify that the new
3192 * password is acceptable.
3195 if (pass_new[0] == '\0') {/* "\0" password = NULL */
3201 * By reaching here we have approved the passwords and must now
3202 * rebuild the password database file.
3204 pam_get_data(pamh, PAM_WINBIND_PWD_LAST_SET,
3205 (const void **) &pwdlastset_update);
3208 * if cached creds were enabled, make sure to set the
3209 * WINBIND_CACHED_LOGIN bit here in order to have winbindd
3210 * update the cached creds storage - gd
3213 ctx->ctrl |= WINBIND_CACHED_LOGIN;
3216 ret = winbind_chauthtok_request(ctx, user, pass_old,
3217 pass_new, pwdlastset_update);
3218 if (ret != PAM_SUCCESS) {
3219 pass_old = pass_new = NULL;
3223 if (_pam_require_krb5_auth_after_chauthtok(ctx, user)) {
3225 const char *member = NULL;
3226 const char *cctype = NULL;
3227 int warn_pwd_expire;
3228 struct wbcLogonUserInfo *info = NULL;
3229 struct wbcUserPasswordPolicyInfo *policy = NULL;
3231 member = get_member_from_config(ctx);
3232 cctype = get_krb5_cc_type_from_config(ctx);
3233 warn_pwd_expire = get_warn_pwd_expire_from_config(ctx);
3235 /* Keep WINBIND_CACHED_LOGIN bit for
3236 * authentication after changing the password.
3237 * This will update the cached credentials in case
3238 * that winbindd_dual_pam_chauthtok() fails
3243 ret = winbind_auth_request(ctx, user, pass_new,
3245 &error, &info, &policy,
3246 NULL, &username_ret);
3247 pass_old = pass_new = NULL;
3249 if (ret == PAM_SUCCESS) {
3251 struct wbcAuthUserInfo *user_info = NULL;
3253 if (info && info->info) {
3254 user_info = info->info;
3257 /* warn a user if the password is about to
3259 _pam_warn_password_expiry(ctx, user_info, policy,
3263 /* set some info3 info for other modules in the
3265 _pam_set_data_info3(ctx, user_info);
3267 /* put krb5ccname into env */
3268 _pam_setup_krb5_env(ctx, info);
3271 pam_set_item(pamh, PAM_USER,
3273 _pam_log_debug(ctx, LOG_INFO,
3274 "Returned user was '%s'",
3281 if (info && info->blobs) {
3282 wbcFreeMemory(info->blobs);
3284 wbcFreeMemory(info);
3285 wbcFreeMemory(policy);
3290 ret = PAM_SERVICE_ERR;
3295 /* Deal with offline errors. */
3297 const char *codes[] = {
3298 "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND",
3299 "NT_STATUS_NO_LOGON_SERVERS",
3300 "NT_STATUS_ACCESS_DENIED"
3303 for (i=0; i<ARRAY_SIZE(codes); i++) {
3305 if (_pam_check_remark_auth_err(ctx, error, codes[i], &_ret)) {
3311 wbcFreeMemory(error);
3313 _PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", ctx, ret);
3322 /* static module data */
3324 struct pam_module _pam_winbind_modstruct = {
3326 pam_sm_authenticate,
3329 pam_sm_open_session,
3330 pam_sm_close_session,
3337 * Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
3338 * Copyright (c) Tim Potter <tpot@samba.org> 2000
3339 * Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
3340 * Copyright (c) Guenther Deschner <gd@samba.org> 2005-2008
3341 * Copyright (c) Jan Rêkorajski 1999.
3342 * Copyright (c) Andrew G. Morgan 1996-8.
3343 * Copyright (c) Alex O. Yuriev, 1996.
3344 * Copyright (c) Cristian Gafton 1996.
3345 * Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
3347 * Redistribution and use in source and binary forms, with or without
3348 * modification, are permitted provided that the following conditions
3350 * 1. Redistributions of source code must retain the above copyright
3351 * notice, and the entire permission notice in its entirety,
3352 * including the disclaimer of warranties.
3353 * 2. Redistributions in binary form must reproduce the above copyright
3354 * notice, this list of conditions and the following disclaimer in the
3355 * documentation and/or other materials provided with the distribution.
3356 * 3. The name of the author may not be used to endorse or promote
3357 * products derived from this software without specific prior
3358 * written permission.
3360 * ALTERNATIVELY, this product may be distributed under the terms of
3361 * the GNU Public License, in which case the provisions of the GPL are
3362 * required INSTEAD OF the above restrictions. (This clause is
3363 * necessary due to a potential bad interaction between the GPL and
3364 * the restrictions contained in a BSD-style copyright.)
3366 * THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
3367 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
3368 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
3369 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
3370 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
3371 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
3372 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3373 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
3374 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
3375 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
3376 * OF THE POSSIBILITY OF SUCH DAMAGE.